rtaudio/RtAudio.h: initialize variables

rtaudio/RtAudio.h: initialize variables

Fixes Coverity CID 710878: Uninitialized scalar field (UNINIT_CTOR)
Non-static class member ""bufferSize"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""channelOffset"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""deviceFormat"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""deviceInterleaved"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""doByteSwap"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""doConvertBuffer"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""latency"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""mode"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""nBuffers"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""nDeviceChannels"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""nUserChannels"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""sampleRate"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""state"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""streamTime"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""userBuffer"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""userFormat"" is not initialized in this constructor nor in any functions that it calls.
Non-static class member ""userInterleaved"" is not initialized in this constructor nor in any functions that it calls.
654      :apiHandle(0), deviceBuffer(0) { device[0] = 11111; device[1] = 11111; }